A Las Vegas pharmacy was searched Tuesday in connection with Michael Jackson's death.

Applied Pharmacy on Flamingo Road in Las Vegas sold the anesthetic propofol to Dr. Conrad Murray, Jackson's doctor, a source familiar with the investigation said.

Another source close to the investigation said last month that Murray, a Texas-based cardiologist, is said to have given Jackson propofol, commonly known by the brand name Diprivan, in the 24 hours before he died.

The search of Applied Pharmacy came two weeks after searches of Murray's home and clinic in Las Vegas.

The search warrant served Tuesday authorized investigators to seize documents -- both on computers and paper -- related to the Jackson investigation, DEA Assistant Special Agent in Charge Mike Flanagan said.

The warrants used for those earlier searches, which were filed in a Clark County, Nevada, court, imply that investigators looking into Jackson's death believe that the singer was a drug addict.

The warrants, signed by District Judge Timothy Williams and given to CNN by Las Vegas affiliate KTNV, say that "there is probable cause to believe" that the searches would uncover evidence at Murray's home and office of excessive prescribing, prescribing to an addict, prescribing to or treating an addict and manslaughter.

They cite "probable cause to believe" that the premises contained "records, shipping orders, distribution lists, use records relating to the purchase, transfer ordering, delivery and storage of propofol (Diprivan)."

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Murray was with Jackson on June 25 when he was rushed to UCLA Medical Center in Los Angeles and when he was pronounced dead, according to Murray's lawyer.

A source involved with the inquiry into Jackson's death has said that investigators found numerous bottles of prescription drugs in his $100,000-a-month rented mansion in Holmby Hills, California.

The items taken from Murray's home included copies of his computer and cell phone hard drives. They were to be turned over to the Los Angeles Police Department, which is leading the investigation into Jackson's death at age 50.

A "thorough and comprehensive" report into the death of Michael Jackson is complete, the Los Angeles County coroner's office said Monday, but police have requested that the report not be released because of the ongoing investigation.

The coroner's office said it would abide by the request that "the cause and manner of death remain confidential" and referred all questions to the Los Angeles Police Department.